59 lines
1.3 KiB
Go
59 lines
1.3 KiB
Go
// +build solaris,cgo
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package zfs
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/*
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#include <sys/statvfs.h>
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#include <stdlib.h>
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static inline struct statvfs *getstatfs(char *s) {
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struct statvfs *buf;
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int err;
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buf = (struct statvfs *)malloc(sizeof(struct statvfs));
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err = statvfs(s, buf);
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return buf;
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}
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*/
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import "C"
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import (
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"path/filepath"
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"strings"
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"unsafe"
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log "github.com/Sirupsen/logrus"
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"github.com/docker/docker/daemon/graphdriver"
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)
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func checkRootdirFs(rootdir string) error {
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cs := C.CString(filepath.Dir(rootdir))
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buf := C.getstatfs(cs)
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// on Solaris buf.f_basetype contains ['z', 'f', 's', 0 ... ]
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if (buf.f_basetype[0] != 122) || (buf.f_basetype[1] != 102) || (buf.f_basetype[2] != 115) ||
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(buf.f_basetype[3] != 0) {
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log.Debugf("[zfs] no zfs dataset found for rootdir '%s'", rootdir)
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C.free(unsafe.Pointer(buf))
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return graphdriver.ErrPrerequisites
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}
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C.free(unsafe.Pointer(buf))
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C.free(unsafe.Pointer(cs))
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return nil
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}
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/* rootfs is introduced to comply with the OCI spec
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which states that root filesystem must be mounted at <CID>/rootfs/ instead of <CID>/
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*/
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func getMountpoint(id string) string {
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maxlen := 12
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// we need to preserve filesystem suffix
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suffix := strings.SplitN(id, "-", 2)
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if len(suffix) > 1 {
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return filepath.Join(id[:maxlen]+"-"+suffix[1], "rootfs", "root")
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}
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return filepath.Join(id[:maxlen], "rootfs", "root")
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}
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